import {
  Card,
  Breadcrumb,
  Form,
  Button,
  Radio,
  Input,
  Upload,
  Space,
  Select,
  message
} from 'antd'
import { PlusOutlined } from '@ant-design/icons'
import { Link, useSearchParams } from 'react-router-dom'
import './index.scss'

import ReactQuill from 'react-quill'
import 'react-quill/dist/quill.snow.css'
import { useEffect, useState } from 'react'
import { addArticleAPI, updateArticleAPI, getArticleByIdAPI } from '@/apis/article'
import { useChannels } from '@/hooks/useChannels'

const { Option } = Select

const Publish = () => {

  // 获取频道列表
  const { channelsList } = useChannels()
  
  // 提交表单，新增文章
  const onFinish = (values) => {
    if (imageList.length !== imageType) {
      return message.warning('封面类型与上传封面数量不一致')
    }
    const { title, content, channel_id } = values
    const params = {
      title,
      content,
      cover: {
        type: imageType,
        images: imageList.map(item => {
          if (item.response) { // 如果是新增的图片，url在返回的response中
            return item.response.data.url
          } else { // 如果是已有的图片，url是自己组装的
            return item.url
          }
        }),
      },
      channel_id,
    }

    // 如果存在文章id，则为编辑文章，否则为新增文章
    if (articleId) {
      updateArticleAPI({...params, id: articleId})
    } else {
      addArticleAPI(params)
    }
  }


  const [imageList, setImageList] = useState([])
  // 上传文件改变时的回调，上传每个阶段都会触发该事件
  const onChange = (value) => {
    console.log(value.fileList)
    setImageList(value.fileList)
  }

  const [imageType, setImageType] = useState(0)
  // 封面类型
  const onTypeChange = (item) => {
    setImageType(item.target.value)
  }

  // 获取路由的query参数：id
  const [searchParams] = useSearchParams()
  const articleId = searchParams.get('id')

  // 创建Form表单示例
  const [form] = Form.useForm()

  useEffect(() => {
    // 根据id获取文章详情
    const getArticleById = async () => {
      const res = await getArticleByIdAPI(articleId)
      // 填充form表单的内容
      // （由于会频繁用到填充表单的操作，所以AntD给出了这样一种方便填充表单的方法）
      form.setFieldsValue({
        ...res.data,
        type: res.data.cover.type,
      })
      // 设置封面类型
      setImageType(res.data.cover.type)
      // 设置已经上传的文件列表
      const urlObjs = res.data.cover.images.map(url => ({ url }))
      setImageList(urlObjs)
    }
    // 如果有articleId才获取文章详情
    if (articleId) {
      getArticleById()
    }
  }, [articleId, form])
  

  return (
    <div className="publish">
      <Card
        title={
          <Breadcrumb items={[
            { title: <Link to={'/'}>首页</Link> },
            { title: articleId ? '编辑文章' : '发布文章' },
          ]}
          />
        }
      >
        <Form
          labelCol={{ span: 4 }}
          wrapperCol={{ span: 16 }}
          initialValues={{ type: 0 }}
          onFinish={onFinish}
          form={form}
        >
          <Form.Item
            label="标题"
            name="title"
            rules={[{ required: true, message: '请输入文章标题' }]}
          >
            <Input placeholder="请输入文章标题" style={{ width: 400 }} />
          </Form.Item>
          <Form.Item
            label="频道"
            name="channel_id"
            rules={[{ required: true, message: '请选择文章频道' }]}
          >
            <Select placeholder="请选择文章频道" style={{ width: 400 }}>
              {
                channelsList.map((item) => (
                  <Option key={item.id} value={item.id}>{item.name}</Option>
                ))
              }
            </Select>
          </Form.Item>
          <Form.Item label="封面">
            <Form.Item name="type">
              <Radio.Group onChange={onTypeChange}>
                <Radio value={1}>单图</Radio>
                <Radio value={3}>三图</Radio>
                <Radio value={0}>无图</Radio>
              </Radio.Group>
            </Form.Item>
            { imageType !== 0 && (
              <Upload
                listType="picture-card"
                showUploadList
                action={'http://geek.itheima.net/v1_0/upload'}
                name="image"
                onChange={onChange}
                maxCount={imageType}
                fileList={imageList}
              >
                <div style={{ marginTop: 8 }}>
                  <PlusOutlined />
                </div>
              </Upload>
            )}
          </Form.Item>
          <Form.Item
            label="内容"
            name="content"
            rules={[{ required: true, message: '请输入文章内容' }]}
          >
            <ReactQuill
              className="publish-quill"
              theme="snow"
              placeholder="请输入文章内容"
            />
          </Form.Item>
          <Form.Item wrapperCol={{ offset: 4 }}>
            <Space>
              <Button size="large" type="primary" htmlType="submit">
                发布文章
              </Button>
            </Space>
          </Form.Item>
        </Form>
      </Card>
    </div>
  )
}

export default Publish